61454 -- U.S. ZIP code Municipality (1990): LOMAX, Illinois All ZIPs for this municipality (1990): 61454 Population (2000): 771 Housing Units (2000): 342 Land area (2000): 30.517916 sq. miles (79.041035 sq. km) Water area (2000): 0.070893 sq. miles (0.183611 sq. km) Total area (2000): 30.588809 sq. miles (79.224646 sq. km) Located within: Illinois (IL) Location: 40.685436 N, 91.052073 W